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Questions related from Vahid Mosallanejad
Please check the attachment.
11 November 2018 9,792 0 View
I first need to perform a "Stationary" study ( first step) and then "Eigenvalue" study as the second step in a COMSOL model. The Eigenvalue PDE will feed by the results of "Stationary" study. I...
03 March 2016 8,966 1 View
There is one example which clearly shows, who it is possible to optimized parameters in order to fit 1D experimental data to a 1D function in COMSOL. At the end ,"Global" node has been used to...
02 February 2016 5,221 0 View
The results of first study can be imported in second study by adjusting the solution setting “Values of Dependent Variable” –“Values of Variables Not Solved for”. However, it is unclear How to...
12 December 2015 9,642 1 View
To prevent conflict between two similar Eigenvalue “studies” I need to change the Default name of Eigenvalue from “lambda” to let’s say, “lambda2”? How can I change it? I would be appreciate of...
12 December 2015 2,568 2 View
Imagine, there are series of 2D results which must be complete using "parametric sweep" (e.g. set of {S(y, z)}, each " S" for one point in x direction). This means "Parametric sweep" has been done...
11 November 2015 1,856 1 View
It is possible to define a position dependent variable in COMSOL by some sort of logical conditional expression, like: 8*(y10). However, in practical 2D example, there is some...
11 November 2015 7,638 3 View
I am very thankful if anybody give me a suggestion. It is well described who to build 2D Geometry from 3D in COMSOL. Imagine, a cross section of first result (Lets call the first results as...
10 October 2015 4,296 6 View
Imagine you have two 3D PDE to solve by COMSOL. The answer of first one will later replace as position dependent variable in second physics. There is two option. One way to do that is to export...
05 May 2015 8,283 4 View
I mean some simple mixing scheme like u_input (i+1)= (1-A)*u_input(i)+ A*u_output(i) (A is a constant value less than 1, like A=0.2) Can anybody introduce me where I can study about the...
04 April 2015 9,950 6 View
Assume a COMSOL model with three different physics. Let’s say that first physics has an output V1 and second output is V2. If I wanted to use one of them as position dependent variable in the...
04 April 2015 782 1 View
Vertical electric field is using to tune the electrical properties of channel in FETs. In new 2D material this is referred to the shifting of electrochemical potential. In contrast in simple...
04 April 2015 5,311 5 View
Hi, I need to do some calculations with the results of an eigenvalue PDE. For instance, multiplying eigenvalues to the eigenvectors or adding two eigenvectors to each other. How can I distinguish...
01 January 2015 5,973 1 View
I am trying to solve a set of PDEs using a combination of MATLAB (to run the loop) and COMSOL. Then I use the output of COMSOL and after small process the output of COMSOL which is loaded in...
12 December 2014 9,456 4 View
I have noticed that COMSOL does not give me normalized eigenvalue when I tried to solve 1D/Mathematics/Coefficient Form PDE/Eigenvalue. should I manually normalize the Eigenfunction? How can I...
12 December 2014 2,993 1 View
I should solve two different PDEs in one COMSOL model (first "Stationary" and second is "Eigenvalue") in such a way that the output of first Stationary Physics(the electrostatic potential) used in...
11 November 2014 8,751 8 View
It seems the key is to define an auxiliary independent variable (in attachment the variable "x") and be able to define the Dirac delta function. In an imaginary perspective for a 1D problem we...
01 January 1970 7,631 0 View
In a 2D model of a high-temperature superconductor wire in COMSOL, a pointwise constraint can be added to a point on the circumference to include the current passing through the superconductor...
01 January 1970 1,039 1 View
